JPH09146419A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of an erroneous copy due to the improper setting of a transfer paper sheet by indicating the setting, direction and position of the transfer paper sheet for confirmation at the time of forming an image on the second side thereof at a manual double sided copying process. SOLUTION: A system control unit 8 detects the size, the feed direction or the like of a transfer paper sheet with an image copied on the first side, on the basis of the result of detection with a paper sheet size detection unit 80 and the result of the detection is registered with a memory. Furthermore, the system control unit 8 identifies a paper sheet feed direction or the like on the basis of data or the like registered with the memory, and a manual reverse side copying operation screen necessary for forming an image on the second side is shown on a display. Then, contents shown in the manual reverse side copying operation screen on the display is confirmed by an operator, and the transfer paper sheet with an image copied on the first side is set in a specified feed tray among the trays 72, and 65 to 67.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus for displaying an operating method and the like on an operation display device composed of a liquid crystal panel or the like by characters or diagrams so as to prevent an operation error from occurring.

[0002]

2. Description of the Related Art In an analog copying machine or a digital copying machine which reads an optical image of an original and copies it onto a designated transfer paper, operation contents are displayed in characters or figures to reduce operation mistakes when making a copy. What can be made is being developed.

[0003]

However, in the above-described conventional analog copying machine or digital copying machine, when performing double-sided copying with a copying machine that does not have an automatic double-sided function, or even if it has such a function, a thick paper is used. When performing double-sided copying on special transfer paper such as
The procedure is to make a front side copy on one side, and after this copy is completed, set the once ejected transfer paper to the cassette paper feed tray or manual paper feed tray and make a copy on the second side (back side). Transfer paper must be supplied. Therefore, when performing double-sided copying, it is difficult to understand the relationship between the image copied on the first side and the image copied on the second side. When copying on the second side, the transfer paper set in the paper feed tray is set. I made a mistake in the setting direction of, and failed to copy, so I often had to retake the copy.

The present invention has been made in view of the above circumstances. In claim 1, when the copying is performed on the second side of the transfer sheet by the manual double-sided copying, the transfer sheet is set on the liquid crystal panel of the operation section. An object of the present invention is to provide an image forming apparatus capable of displaying a direction and a position and confirming the displayed position and position, and preventing occurrence of a copy error due to a transfer paper setting error. According to claim 2, when the number of double-sided copies is small or when copying to a special transfer paper such as thick paper, the manual feed tray is selected to set the transfer paper, and the number of double-sided copies is large. In this case, an object of the present invention is to provide an image forming apparatus capable of improving the operability during double-sided copying by selecting a cassette paper feed tray and setting transfer paper. In the third aspect, when the transfer sheet is set, the transfer sheet setting direction (vertical / horizontal direction, front / back surface) is graphically displayed, so that the direction of the transfer sheet to be actually set can be easily understood. An object is to provide an image forming apparatus. According to claim 4, when the transfer paper is set,
An object of the present invention is to provide an image forming apparatus capable of easily recognizing the position of a paper feed tray on which a transfer paper has to be set by displaying the paper feed tray to be used in a schematic manner. According to the present invention, when the paper tray is misused when the transfer paper is set, this is detected, an error message is displayed on the screen, and a copy error caused by the misuse of the paper tray is detected. An object of the present invention is to provide an image forming apparatus that can be prevented in advance.

[0005]

In order to achieve the above object, the present invention provides a mode key provided in an operation section in an image forming apparatus having an operation display device for displaying an operation method. When the manual double-sided mode is designated, the transfer paper necessary for performing the copy on the second surface of the transfer paper is displayed on the operation display device after the copy on the first surface of the transfer paper is completed. It is characterized by displaying the setting method. According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, when copying is performed on at least one of the first side and the second side of the transfer sheet, the transfer sheet is set on a manual paper feed tray or a plurality of paper feed trays. The feature is that one of the transfer papers is selected and used. According to a third aspect of the present invention, in the image forming apparatus according to any one of the first and second aspects, when the copying of the first side of the transfer sheet is completed, the transfer sheet for copying the second side is displayed on the operation display device. The feature is that the paper size and setting direction of are displayed graphically. In claim 4, claim 1, 2, 3
In the image forming apparatus according to any one of 1 to 3, when the copying on the first side of the transfer sheet is completed, the transfer sheet for copying the second side must be set on the operation display device. It is characterized by displaying the position graphically. According to a fifth aspect of the present invention, in the image forming apparatus according to any one of the first, second, third, and fourth aspects,
When the second side is copied after the copying on the first side is finished, it is checked whether the transfer sheet on which the first side has been copied is set correctly. When the transfer sheet is not set correctly, An error message screen is displayed on the operation display device.

In the above structure, according to the first aspect, in the image forming apparatus having the operation display device for displaying the operation method, when the manual double-sided mode is designated by the mode key provided on the operation unit, the transfer is performed. After the copying on the first side of the paper is completed, a manual double-sided copying is performed by displaying on the operation display device a method for setting the transfer sheet necessary for performing the copying on the second side of the transfer sheet. When making a copy on the second side of the paper, the transfer paper setting direction and position are displayed on the liquid crystal panel of the operation unit so that they can be confirmed, and the occurrence of a copy error due to a transfer paper setting error is caused. Prevent. According to a second aspect, in the image forming apparatus according to the first aspect, the first surface of the transfer paper,
When copying on at least one of the second sides, by selecting and using either the manual paper feed tray or the transfer paper set in a plurality of paper feed trays, the number of double-sided copies may be small. When copying to special transfer paper such as thick paper, select the manual paper feed tray to set the transfer paper.If the number of double-sided copies is large, select the cassette paper feed tray to set the transfer paper. To improve the operability during double-sided copying. According to a third aspect of the present invention, in the image forming apparatus according to any one of the first and second aspects, when the copying of the first side of the transfer sheet is completed, the transfer sheet for copying the second side is displayed on the operation display device. When the transfer paper is set by displaying the paper size and setting direction of, the transfer paper setting direction (vertical / horizontal direction, front / back) is displayed graphically and the direction of the transfer paper actually set To make it easier to understand. In claim 4,
The image forming apparatus according to any one of claims 1, 2, and 3, when copying on the first side of the transfer sheet is completed,
By graphically displaying the position of the paper feed tray where the transfer paper for copying the second side must be set on the operation display device, the paper feed tray used when setting the transfer paper is illustrated. The position of the paper feed tray where the transfer paper must be set can be easily known. According to a fifth aspect, in the image forming apparatus according to any one of the first, second, third, and fourth aspects, when the copying of the first side of the transfer sheet is completed and the second side is copied, the first side Check if the transfer paper that has been copied is set correctly and if the transfer paper is not set correctly, set the transfer paper by displaying an error message screen on the operation display device. At this time, when the misuse of the paper feed tray occurs, this is detected, an error message is displayed on the screen, and the occurrence of a copy error due to the misuse of the paper feed tray is prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is a schematic configuration diagram of a digital full-color copying machine showing an example of an image forming apparatus according to the present invention. A digital full-color copying machine 1 shown in this figure has a device casing 2 formed in a vertically long rectangular shape, an image reading device 3 provided on the upper side of the device casing 2, and an image reading device 3 provided on the lower side of the device casing 2. An image forming device 4, a paper feeding device 5 provided further below the device casing 2, and an operation display device 6 provided on the upper portion of the device casing 2.
When the operation display device 6 is operated and a copy process is instructed while displaying an operation screen or the like on the operation display device 6, the image reading device 3 is operated to read the image of the document and the reading operation. While processing the image data obtained in step 1, the image creating device 4 is operated in the designated copy mode to form a toner image corresponding to the image data on the transfer paper of the designated size, and the toner image is taken out of the machine. Eject the paper. Hereinafter, the image reading device 3, the image forming device 4, the paper feeding device 5, and the operation display device 6 which compose the digital full-color copying machine 1 will be described in detail. First, the image reading device 3 includes a contact glass 62 fitted in an opening formed in the upper part of the device casing 2, a pressure plate 7 arranged on the upper part of the device casing 2 so as to be openable and closable, and a device casing. 2, the light source is turned on based on the control signal output from the system control unit 8 of the image forming apparatus 4, and the optical image of the original placed on the contact glass 62 is read. An image reading unit 9 for generating an electric signal (image signal) corresponding to the optical image by the line CCD sensor, and an image signal output from the image reading unit 9 are taken in and converted into a digital signal (image data). Conversion, shading correction, MTF correction, γ
After performing correction, color conversion, gradation correction, etc., based on an instruction from the system control unit 8, various corrected image data is written into the image writing unit 1 of the image creating apparatus 4.
1 and the image processing unit 10 which supplies the image processing unit 1 to

When an image reading command is output from the system control unit 8 on the side of the image forming apparatus 4, the image reading unit 9 is operated to read the optical image of the original placed on the contact glass 62, The image writing unit 11 of the image creating apparatus 4 generates the various corrected image data and outputs the various corrected image data.
The image forming apparatus 4 is operated in the designated copy mode by the control signal output from the system control unit 8 while being supplied to the image forming apparatus 4. The image creating device 4 includes an image writing unit 11 that generates an optical image based on image data output from the image processing unit 10 of the image reading device 3.
And the image writing unit 11 having a photoconductor drum.
Drum unit 1 that converts the optical image generated in
2 and a developing unit 13 that visualizes the electrostatic latent image formed on the photosensitive drum of the drum unit 12 as black, cyan, magenta, and yellow toner images.
An intermediate transfer belt unit 14 that has an intermediate transfer belt and that forms one color toner image by superposing the black, cyan, magenta, and yellow toner images created by the developing unit 13 on top of each other; A paper transfer unit 15 for transferring the color toner image formed by the intermediate transfer belt unit 14 to the transfer paper supplied from the device 5 is provided.

Further, the image forming apparatus 4 melts and fixes the toner on the transfer paper onto which the color toner image has been transferred by the paper transfer unit 15, and a paper discharge tray (not shown) attached to the apparatus casing 2. Based on the fixing unit 16 for discharging the sheet above and the operation contents output from the operation display device 6 and a preset program, the copying machine mechanism section 17 provided in each section of the digital full color copying machine 1 And each sensor unit, the image reading unit 9, the image processing unit 10, the operation unit unit 18 of the operation display device 6, the operation display unit 19, and the like, and the system control unit 8 for controlling the operation. Based on the operation contents output from the operation display device 6 and a preset program, the system control unit 8
Control the operation of each part of the apparatus to capture the image data output from the image reading apparatus 3, visualize this as a color toner image, and transfer it onto a transfer paper of a specified size, and then transfer the image. The color toner image on the paper is fixed and discharged onto the discharge tray outside the machine.

Further, the operation display device 6 includes a CPU circuit 20 for performing various data processing as shown in FIG.
A crystal oscillator 21 that generates a clock signal necessary for operating the U circuit 20, and an optical transceiver circuit 22 that supports optical communication between the CPU circuit 20 and the image creating device 4, the image reading device 3, and the like. And the CPU circuit 2
An address latch circuit 23 that latches (temporarily holds) the address data output from 0, and an address decoder circuit 24 that decodes the address data latched by the address latch circuit 23 to generate a reset signal or a selection signal. And the OS used in the CPU circuit 20
And constant data are stored in the address decoder circuit 2
When selected by the selection signal output from the ROM 4, the ROM circuit 25 reads the data stored in the address specified by the address data latched by the address latch circuit 23 and supplies it to the CPU circuit 20. A system reset circuit 26 for resetting the CPU circuit 20 when a reset signal is output from the address decoder circuit 24, and an LCD arranged on the upper part of the device casing 2.
Display (liquid crystal display) 27 and this LCD
When the LCD display 27 is touched by the operator, the LCDs 27 are arranged so as to overlap each other on the display 27.
A light-transmitting touch panel 28 that detects this and generates touch position information is provided.

Further, the operation display device 6 has a plurality of keys, and when operated by an operator, a keyboard 29 for generating a key signal corresponding to the operated key,
An LED driver circuit 30 for lighting an LED (light emitting diode) provided in a designated key of the keys constituting the keyboard 29 when selected by a selection signal output from the address decoder circuit 24, Based on the selection signal output from the address decoder circuit 24, the operation screen and the instruction screen are displayed on the LCD display 27 based on the address data latched by the address latch circuit 23 and the data output from the CPU circuit 20. Used by the LCD controller circuit 31 and the LCD controller circuit 31, which performs a process of displaying, a key signal output from the keyboard 29, a process of fetching touch position information output from the touch panel 28 and supplying the information to the CPU circuit 20. Constant data and character data Etc. and ROM circuit 32 is stored,
It is provided with a RAM circuit 33 used as a work area for the screen creation processing performed by the LCD controller circuit 31.

When a screen display instruction is output from the system control unit 8, the CPU circuit 20 and the LCD controller circuit 31 take in the screen display instruction and operate based on the screen display instruction and status information output from the system control unit 8. A screen or instruction screen is displayed on the LCD display 27, and in this state, the operator
When the display surface of the D display 27 is touched, it is detected by the touch panel 28 to generate touch position information, and the CPU circuit 20 and the LCD controller circuit 31 process the touch position information to process a key signal corresponding to the touch position. (Operation information) is generated and supplied to the system control unit 8, and when the keyboard 29 is operated, a key signal corresponding to the operation content is generated and supplied to the system control unit 8.

In the LCD controller circuit 31, FIG.
4, the X1 terminal, X2 terminal, Y1 terminal, and Y2 terminal of the touch panel 28 are set to the setting state shown in FIG.
A controller circuit 34 for controlling the touch panel 28,
A detection / measurement instruction signal which is composed of one OR gate circuit 35 and is output from the controller circuit 34,
A decoding circuit 36 for decoding the X / Y designation signal, and 2
One inverter circuit 37, 38, four buffer circuits 39, 40, 41, 42 with control terminals, and one resistor 43, and based on the signal output from the decoding circuit 36, the X1 terminal and the X2 terminal of the touch panel 28. , Y1 terminals and Y2 terminals, the drive circuit 44 for selectively supplying and applying the applied voltage for detection and the applied voltage for measurement, and one inverter circuit 45 and 2
Composed of two analog gate circuits 46 and 47,
A signal fetch circuit 48 for fetching and passing the detection voltage output from the X1 terminal and the Y1 terminal of the touch panel 28 based on the signal output from the decoding circuit 36;
Based on the sampling clock signal, resolution data, etc. output from the controller circuit 34, the detection voltage output from the signal acquisition circuit 48 is A / D converted to generate voltage data, which is supplied to the controller circuit 34. A touch panel detection circuit 50 including an A / D converter circuit 49 that operates is provided.

When detecting the touch position, first, the controller circuit 34 sets the detection terminals to the High state, and the X1 terminal, X2 terminal, Y1 terminal and Y2 terminal of the touch panel 28 are set as shown in FIG. The resistor 43 pulls up the Y1 terminal and the Y2 terminal to "+ 5V" to put the entire circuit in the detection mode. In this state, when the operator touches an arbitrary point on the touch panel 28 and the voltages at the Y1 terminal and the Y2 terminal become “0V”, the value of the voltage data output from the A / D converter circuit 49 becomes the value. Based on the above Y1 terminal, Y
Detecting the voltage drop of the two terminals, 1 on the touch panel 28
Detects that a point has been touched.

Based on the detection result, the controller circuit 34 sets the entire circuit to the measurement mode, and the X1 terminal of the touch panel 28 is "+ 5V" and the X2 terminal is "0V".
While outputting the detection voltage having the voltage value corresponding to the touch position from the Y1 terminal of the touch panel 28, the A / D
The voltage data obtained by A / D conversion by the converter circuit 49 is taken in and the touched X position is detected. Next, the controller circuit 34 causes the Y1 terminal of the touch panel 28 to be “+ 5V” and the Y2 terminal to be “0V”.
While outputting the detection voltage having the voltage value corresponding to the touch position from the X1 terminal of the touch panel 28, the A / D
The voltage data obtained by A / D conversion by the converter circuit 49 is taken in to detect the touched Y position.

A keyboard 29 of the operation display device 6 is also provided.
Is arranged on the right side of the LCD display 27 and the touch panel 28 arranged on the LCD display 27 on the operation panel 51 arranged on the upper part of the device casing 2 as shown in FIG. Numeric keypad 52 that is operated when performing the operation and operation panel 5
1, a mode clear / preheat key 53, which is arranged on the right side of the numeric keypad 52 and is operated when canceling the set mode and returning to the initial setting or when the preheat state is obtained by continuous pressing for a certain time or more, and the operation panel. An interrupt key 54, which is arranged on the back side of the mode clear / preheat key 53 on the control panel 51 and is operated to interrupt another copy to copy another document, and the ten key 52 on the operation panel 51. The clear / stop key 55 is arranged on the front side and is operated when clearing the input numerical value or when copying is interrupted during copying, and on the right side of the clear / stop key 55 on the operation panel 51,
A print start key 56 that is operated when starting the copying is provided.

Further, the keyboard 29 is the operation panel 5
1 is arranged on the left side of the LCD display 27 and the touch panel 28 and is operated when adjusting the image quality of the screen displayed on the LCD display 27, and the image quality adjustment is performed on the operation panel 51. A program key 58 arranged on the front side of the key 57 and operated when registering or calling a frequently used mode, and on the operation panel 51 on the front side of the program key 58, the image display unit ( Area editing key 59, which is operated when performing area processing and editing by the display editor), and is arranged in front of the area processing key 59 on the operation panel 51, and when the manual double-sided copy mode is set. Image quality adjustment on the operated manual duplex mode key 60 and the operation panel 51 Arranged on the left side of over 57, and a brightness adjustment knob 61 is operated to adjust the brightness of a screen displayed on the LCD Display 27.

When the operator depresses any one of the ten keys 52 to the manual double-sided mode key 60 or rotates the brightness adjusting knob 61, the key signal corresponding to the operated key or the rotation of the brightness adjusting knob 61 is rotated. A signal indicating the angle is generated and supplied to the LCD controller circuit 31, and the system control unit 8 is informed of the copy mode instruction and the copy number instruction. Further, as shown in FIG. 1, the sheet feeding device 5 is housed in the device casing 2 so as to be retractable and retractable, and the first to third sheet feeding trays 65 to 67 in which transfer sheets of a predetermined size are stored, These first to third
First to third take-out units 68 to 70 for taking out the transfer sheets stored in the paper feed trays 65 to 67, and the first to third take-out units 68 to 70
~ Vertical transport unit 71 for transporting the transfer paper taken out by the third take-out unit 68-70 upward, and transfer paper transported by the vertical transport unit 71 or transfer paper supplied from the manual paper feed tray 72 When the printing operation is performed, if the transfer paper is supplied from the manual paper feed tray 72, the transfer paper is taken in when the transfer paper is supplied. If the transfer paper is not supplied from the manual paper feed tray 72, the transfer paper of the designated size is taken in among the transfer papers stored in the first to third paper feed trays 65 to 67, and the transfer paper is moved upward. While transferring, the above-mentioned transfer is performed at the timing when the front end of the color toner image formed on the intermediate transfer belt reaches the paper transfer position. The paper supplied to the sheet transfer unit 15.

As shown in FIG. 6, the manual paper feed tray 72 is composed of a reflection type photo sensor, is arranged on the back surface of the tray plate 74, and detects the presence or absence of the transfer paper set on the front surface of the tray plate 74. This transfer paper is used for the device housing 2.
A length detection sensor 75 for detecting the length of the transfer paper when it is taken in, and a slider 77 that slides in conjunction with a document guide 76 slidably arranged on the front surface side of the tray plate 74 and a drawing. As shown in FIG. 7, a width size detecting plate 78 for detecting the position of the slider 77 is provided, and a width detecting sensor 79 for detecting the width of the set transfer sheet is provided on the back surface of the tray plate 74. The size of the set transfer paper is detected, and the detection result is supplied to the system control unit 8.

The first to third paper feed trays 65 to 6 are also provided.
7, the size lever 82 is provided on the paper feed tray 81 as shown in FIG. 8 and is slid according to the size of the set transfer paper, and the notch position of the size lever 82 is detected. It can be stored by a paper size detection mechanism 84 including five push switches 83 for generating size detection data shown in FIG. 9 and a side fence 86 and an end fence 87 attached to a paper feed tray 85 as shown in FIG. A size fixing mechanism 88 for fixing the size of the transfer paper is provided, and the size of the transfer paper set is detected by the paper size detection mechanism 84, and the detection result is supplied to the system control unit 8 or set. By fixing the size of the transfer paper,
The size of the transfer paper set in the first to third paper feed trays 65 to 67 is made known to the system control unit 8 side. That is, by the paper size detection unit 80 (see FIG. 1) configured by the length detection sensor 75, the width detection sensor 79, and the paper size detection mechanism 84,
The size of the set transfer paper or the manually inserted transfer paper is detected, the detection result is supplied to the system control unit 8, and the size fixing mechanism 88 fixes the size of the transfer paper to be set. 1 to 3 paper feed tray 6
The system control unit 8 side is made aware of the size of the transfer paper set within 5-67.

Next, with reference to the flow chart shown in FIG. 11, an example of the operation at the time of manual two-sided copying of this embodiment will be described. First, before the manual double-sided mode key 60 is pressed, the CPU circuit 20 of the operation display device 6 displays the LCD display 27 on the operation panel 51 on the LCD display 27 based on the control contents from the system control unit 8, as shown in FIG. As described above, a copy operation screen 90 displayed when performing a normal copy, that is, a color mode, an automatic density, a manual density, an image quality mode, an automatic paper selection, a paper feed tray, an automatic paper scaling, a normal magnification, a sort, a stack, etc. A copy operation screen 90 indicating the mode selection and the like is displayed. In this state, if the manual double-sided mode key 60 provided on the operation panel 51 is pressed (step ST1), this is detected by the CPU circuit 20, and the manual double-sided copy is displayed on the LCD display 27 as shown in FIG. First in mode
Manual surface copy operation screen 9 required for surface copy
1 is displayed. The operator confirms the contents displayed on the manual front surface copy operation screen 91,
If the print start key 56 is pressed (step S
This is detected by the CPU circuit 20 and the detection result is supplied to the system control unit 8. As a result, the system control unit 8 controls the image reading device 3, the image forming device 4, the paper feeding device 5, and the like to read the image of the document placed on the contact glass 62, and at the same time, feed the paper feeding device 5. The transfer paper of the size specified by is taken out, the toner image of the image is formed on the first surface (front surface) of the transfer paper by the image forming device 4, and the copied transfer paper is placed on the discharge tray. The paper is ejected. Thereafter, the copy operation on the first side is repeated for each of the designated number of transfer papers taken out by the paper feeding device 5, and the copied transfer papers are discharged onto the discharge tray.

At this time, the system control unit 8
Based on the detection result of the paper size detection unit 80 and the like, the paper size, the paper insertion direction, etc. of the transfer paper on which the first side is copied are detected, and the detection result is registered in the memory (step ST4). ). In addition, the LCD display 2 is operated by the operator by the above-described operation.
When the back side mode icon 92, the cancel icon 93, etc. of the manual front side copy operation screen 91 displayed on the screen 7 are touched (step ST2), this is detected by the system control unit 8 to copy the first side described above. Processing is skipped. After that, the transfer paper on which the first side has been copied is manually fed, such as when the number of sheets of transfer paper on which the first side has been copied is small, or when it is special paper such as thick paper. If it is necessary to set the transfer paper to the second surface (step ST5), the system control unit 8 can make a correct copy on the second surface of the transfer paper based on the contents registered in the memory. The size, the direction of the paper, etc. are determined, and the CPU circuit 20 displays a manual back side copy operation screen 94 on the LCD display 27, which is necessary for performing the second side copy using the manual paper feed tray 72 as shown in FIG. This is displayed and the operator is informed of the position and setting direction of the tray on which the transfer paper has to be set on this manual back side copy operation screen 94 (step ST
6).

As in the case where a large number of transfer sheets have been copied on the first side, the transfer sheets on which the first side has been copied are placed in one of the first to third paper feed trays 65 to 67. If it is necessary to set the transfer paper to the second surface (step ST5), the system control unit 8 can make a correct copy on the second surface of the transfer paper based on the contents registered in the memory. The size, the direction of the paper, etc. are determined, and the CPU circuit 20 uses the first to third paper feed trays 65 to 67 on the LCD display 27 as shown in FIG. The back side copy operation screen 95 is displayed, and the operator is presented with the manual back side copy operation screen 95 such as the tray position and the direction in which the transfer paper must be set (step ST6).

The operator confirms the contents displayed on the manual back side copy operation screens 94 and 95, and the transfer sheet on which the copying of the first side is finished is manually fed by the paper feed tray 72.
Or the print start key 5 after being set in the designated paper feed tray among the first to third paper feed trays 65 to 67.
If 6 is pressed (step ST7), the CPU circuit 20
This is detected by the system control unit 8, and it is checked by the system control unit 8 whether or not the transfer paper on which the copying of the first side is completed is correctly set in the designated paper feed tray, and this transfer paper is set in the correct paper feed tray. If not, an error message screen 96 shown in FIG. 16 is displayed on the LCD display 27, and the transfer paper is set in the correct paper feed tray in the correct direction.

Thereafter, when the print start key 56 is pressed, the CPU circuit 20 detects this and supplies the detection result to the system control unit 8 (step ST8). As a result, the system control unit 8
Depending on the image reading device 3, the image creating device 4 and the paper feeding device 5,
Is controlled to read the image of the document placed on the contact glass 62, and the paper feeding device 5
Then, the transfer paper with the first side copied is taken out,
The toner image of the image is formed on the second surface (back surface) of the transfer paper by the image forming device 4, and the copied transfer paper is discharged onto the paper discharge tray. Hereafter, only the specified number of sheets
The copying operation on the second side is repeated for each transfer sheet taken out by the sheet feeding device 5, and the copied transfer sheet is discharged onto the discharge tray.

As described above, in this embodiment, when the copying is performed on the second side of the transfer sheet by the manual double-sided copying, the first display is made on the LCD display 27 of the operation panel 51.
By displaying the setting direction of the transfer paper after the copying of the side and the position of the paper tray to be set so that the operator can confirm this, the occurrence of a copy error caused by a transfer paper setting error can be prevented. It can be prevented. In addition, in this embodiment, when the number of double-sided copies is small or when copying to special transfer paper such as thick paper,
When the manual back side copy operation screen 94 shown in FIG. 14 is displayed on the LCD display 27, the manual paper feed tray 72 is selected, transfer paper is set, and when the number of double-sided copies is large, the LCD display is displayed. Since the manual back side copy operation screen 95 shown in FIG. 15 is displayed on 27 and any one of the first to third paper feed tray cassettes 65 to 67 is selected to set the transfer paper,
The operability during double-sided copying can be improved.

Further, in this embodiment, the manual back side copy operation screen 94 shown in FIG. 14 is displayed on the LCD display 27.
When the transfer paper is set by displaying the manual back side copy operation screen 95 shown in FIG. 15 or FIG. 15, the transfer paper setting direction (vertical / horizontal direction, front / back side) is graphically displayed.
It is possible to make the direction of the transfer paper actually set easier to understand. In addition, in this embodiment, the LCD display 2
By displaying the manual back side copy operation screen 94 shown in FIG. 14 or the manual back side copy operation screen 95 shown in FIG. 15 on 7, the position of the paper feed tray to be used when setting the transfer paper is graphically displayed. , The position of the paper feed tray where the transfer paper must be set can be easily known. Further, in this embodiment, when the transfer paper on which the first side has been copied is set in the manual paper feed tray 72 or the first to third paper feed trays 65 to 67, the paper feed tray is misused. Since this is detected and the error message screen 96 shown in FIG. 16 is displayed on the LCD display 27, it is possible to prevent the occurrence of a copy error due to the misuse of the paper feed tray. .

[0028]

As described above, according to the present invention, in claim 1, when the copying is performed on the second surface of the transfer paper by the manual double-sided copying, the direction of setting the transfer paper on the liquid crystal panel of the operation unit is set. It is possible to prevent the occurrence of a copy error due to a setting error of the transfer paper by displaying the position and displaying it. Further, in claim 2, when the number of double-sided copies is small or when copying to a special transfer paper such as thick paper, the manual feed tray is selected to set the transfer paper, and the number of double-sided copies is reduced. For large quantities,
By selecting the cassette paper feed tray and setting the transfer paper, it is possible to improve the operability during double-sided copying.

Further, in claim 3, when the transfer paper is set, the direction of the transfer paper to be actually set can be understood by displaying the set direction (vertical / horizontal direction, front / back surface) of the transfer paper in a graphic form. Can be made easier. According to the fourth aspect, when the transfer paper is set, the position of the paper supply tray on which the transfer paper has to be set can be easily known by displaying the paper supply tray to be used. Further, in claim 5, when the transfer tray is set, when the paper tray is misused, it is detected, an error message is displayed on the screen, and a copy error caused by the misuse of the paper tray is detected. Occurrence can be prevented in advance.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a digital full-color copying machine showing an example of an image forming apparatus according to the present invention.

FIG. 2 is a block diagram showing a circuit configuration example of the operation display device shown in FIG.

3 is a circuit diagram showing an example of a touch panel detection circuit provided in the LCD controller circuit shown in FIG.

FIG. 4 is a diagram showing a setting example of the controller circuit shown in FIG.

5 is a plan view showing a keyboard example of the operation display device shown in FIG. 1. FIG.

6 is a perspective view showing an example of a length detection sensor and a width detection sensor provided in a manual sheet feeding tray of the sheet feeding device shown in FIG.

7 is a perspective view showing a detailed configuration example of the width detection sensor shown in FIG.

8 is a perspective view showing an example of a sheet size detection mechanism provided in first to third sheet feeding trays of the sheet feeding device shown in FIG.

9 is a diagram showing an output example of the push switch shown in FIG.

FIG. 10 is a first paper feed tray to a third paper feed tray of the paper feed device shown in FIG.
FIG. 3 is a perspective view showing an example of a size fixing mechanism provided in a paper feed tray.

FIG. 11 is a flowchart showing an operation example during manual double-sided copying in the digital full-color copying machine shown in FIG.

12 is a plan view showing an example of a copy operation screen displayed on the operation display device shown in FIG.

13 is a plan view showing an example of a manual front side copy operation screen displayed on the operation display device shown in FIG.

14 is a plan view showing an example of a manual back side copy operation screen displayed on the operation display device shown in FIG.

15 is a plan view showing an example of a manual back side copy operation screen displayed on the operation display device shown in FIG.

16 is a plan view showing an example of an error message screen displayed on the operation display device shown in FIG.

[Explanation of reference numerals] 1 digital full-color copying machine (image forming apparatus), 2
Device case, 3 image reading device, 4 image creating device, 5
Paper feeding device, 6 operation display device, 7 pressure plate, 8 system control unit, 9 image reading unit, 10 image processing unit, 11 image writing unit, 12 drum unit, 13 developing unit, 14 intermediate transfer belt unit, 15 paper transfer unit, 16 fixing unit,
17 copy machine mechanism section, 18 operation section unit, 19 operation display unit, 20 CPU circuit, 21 crystal oscillator,
22 optical transceiver circuit, 23 address latch circuit, 24 address decoder circuit, 25 ROM circuit,
26 system reset circuit, 27 LCD display, 28 touch panel, 29 keyboard, 30 L
ED driver circuit, 31 LCD controller circuit, 3
2 ROM circuit, 33 RAM circuit, 34 controller circuit, 35 OR gate circuit 35, 36 decode circuit, 37, 38 inverter circuit, 39, 40, 41,
42 buffer circuit with control terminal, 43 resistor, 44
Drive circuit, 45 inverter circuit, 46, 47 analog gate circuit, 48 signal acquisition circuit, 49 A / D converter circuit, 50 touch panel detection circuit, 51 operation panel, 52 numeric keypad, 53 mode clear / preheat key, 54 interrupt key, 55 Clear / Stop key, 56 Print start key, 57 Image quality adjustment key, 58 Program key, 59 Area processing key, 6
0 Manual double-sided mode key, 61 Brightness adjustment knob, 62
Contact glass, 65-67 1st-3rd paper feed tray, 68-70 1st-3rd take-out unit, 71 Vertical conveyance unit, 72 Manual feed tray, 73 Registration roller, 74 Tray plate, 75 Length detection sensor , 76
Document guide, 77 slider, 78 width size detection plate,
79 width detection sensor, 80 paper size detection unit,
81 paper feed tray, 82 size lever, 83 push switch, 84 paper size detection mechanism, 85 paper feed tray, 86 side fence, 87 end fence,
88 size fixing mechanism, 90 copy operation screen, 91
Manual front side copy operation screen, 92 Back side mode icon,
93 cancel icon, 94 manual back side copy operation screen, 95 manual back side copy operation screen, 96 error message screen

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazushige Taguchi 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.

Claims (5)

[Claims] 1. An image forming apparatus equipped with an operation display device for displaying an operation method, wherein when a manual double-sided mode is designated by a mode key provided on an operation unit, a copy to a first side of a transfer sheet is made. After completion, the image forming apparatus displays on the operation display device a transfer paper setting method necessary for performing copying on the second surface of the transfer paper. 2. The image forming apparatus according to claim 1, wherein when a copy is made on at least one of the first side and the second side of the transfer paper, the transfer paper is set in a manual paper feed tray or a plurality of paper feed trays. An image forming apparatus characterized by selecting and using one of transfer sheets. 3. The image forming apparatus according to claim 1, wherein the copying of the second surface is performed on the operation display device when the copying of the first surface of the transferring paper is completed. An image forming apparatus that graphically displays the sheet size and the setting direction of the sheet. 4. The image forming apparatus according to claim 1, wherein when the copying of the first surface of the transfer paper is completed, the second surface is copied on the operation display device. An image forming apparatus that graphically displays the position of a paper feed tray where transfer paper must be set. 5. The image forming apparatus according to claim 1, 2, 3 or 4, wherein when the copying of the second side is completed after the copying of the first side of the transfer paper is completed, After completion of copying, it is checked whether the transfer paper is set correctly, and when the transfer paper is not set correctly, an error message screen is displayed on the operation display device. .